Most Recently Asked Sterilisation, Culture Media & Pure Culture Techniques Objective Type Questions And Answers

51. The bacterial culture prepared by pure culture is
a. Inoculum
b. Suspension
c. Dilution
d. None of these
Ans: A

52. Separation of a single colony is
a. Pure-culturing
b. Isolation
c. Separation
d. Both a and b
Ans: B

53. Growth period of the culture is
a. Inoculation
b. Incubation
c. Incineration
d. Isolation
Ans: B

54. At the temperature 160oC for one hour, complete sterilization occurs in
a. Autoclave
b. Hot air oven
c. Laminar flow
d. Incubator
Ans: B

55. In autoclave, the principle involved is
a. Dry heat
b. Moist heat
c. Steam under pressur
d. Both b and c
Ans: D

56. The spores of th bacteria which can withstand the moist heat effect also
a. Bacillus subtilis
b. Coxiella burnetti
c. Bacillus stearothermophilus
d. Pseudomonas
Ans: C

57. Factors on which disinfectivity of a disinfectant depends
a. Concentration of the substance
b. Time of action
c. pH of the medium and temperature suitable for the chemical
d. All of the above
Ans: D

58. Aldehydes, which are most powerful disinfectants
a. Formaldehyde
b. Acetaldehyde
c. Glutamal aldehyde
d. Both a and c
Ans: D

59. Accridine dyes are more effective against
a. Gram positive
b. Gram negative
c. Mycoplasmas
d. Rickttsiae
Ans: A

60. The sterilizing agent is
a. Ethelene oxide
b. Oxygen
c. Nitrogen
d. Carbon tetrachloride
Ans: A

More Questions & Answers:-
Page1 Page2 Page3 Page4 Page5 Page6 Page7 Page8 Page9 
Page10